A new combination of a membrane and a photocatalytic reactor for the depollution of turbid water

Azrague, Kamal; Aimar, Pierre; Benoit-Marquié, Florence; Maurette, Marie-Thérèse

doi:10.1016/j.apcatb.2006.10.007

Cited by 95 publications

(45 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Though the above result seems to be original, interesting and more adapted for some chemical engineering fields (sanitation, depollution) [16][17][18], it cannot be applied to the field of drinking water network optimization since molar fractions of constituents in this field, are very low ranging around 10 -6 due to the WHO regulation on chlorine residuals WHO [12]. Therefore, it seems more judicious and relevant to reduce the exergy destruction to its mechanical contribution which is the most important part from a thermodynamic point of view and consider the chemical contribution as a constraint.…”

Section: Total Exergy Destruction Analysismentioning

confidence: 99%

Environmental optimization of tree-shaped water distribution networks

Bieupoude¹,

Azoumah²,

Neveu³

2011

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

In this paper two optimal tree-shaped networks for drinking water and irrigation are constructed by using the constructal approach coupled with the exergy destruction minimization method. It is shown that in the construction of treeshaped network for water distribution, the method of exergy destruction minimization is equivalent to minimizing mechanical irreversibility under a water quality constraint. For both energy consumption and the fluid quality degradation appearing in the network, this study offers new interesting routes for optimizing the system either by the exergy destruction minimization (in that case, both irreversible processes are taken into account in the optimization procedure) or by minimizing one of the two irreversible processes, the other being taken into account as optimization constraint. This paper shows that, for the improvement of performances it is important to focus on the design of an efficient distribution network rather than enhancing only the transport properties.

show abstract

Section: Total Exergy Destruction Analysismentioning

confidence: 99%

Environmental optimization of tree-shaped water distribution networks

Bieupoude¹,

Azoumah²,

Neveu³

2011

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

show abstract

“…Furthermore, some inorganic ions in feed water and those released in degradation process could be bound to photocatalyst particles, enhancing fouling layer consequently [120]. The as described membrane fouling would decrease permeate flux as well as diminish effective photocatalyst concentration in suspension, resulting in negative effect on PMR performance [90]. Therefore, it is significant to develop effective approaches for reducing membrane fouling.…”

Section: Future Challenges and Prospectsmentioning

confidence: 99%

“…In the PMRs, the most applied membrane configurations are hollow fiber membrane and flat sheet membrane. Azrague et al [90] investigated the treatment performance of turbid water in a PMR with both inside-out hollow fiber membrane and flat sheet membrane. The results showed that obvious deposition of pollutants and photocatalyst occurred inside the hollow fiber membrane, whereas less fouling was observed for flat sheet membrane.…”

Section: Membrane Configurationmentioning

confidence: 99%

See 1 more Smart Citation

Photocatalytic Membrane Reactors (PMRs) in Water Treatment: Configurations and Influencing Factors

et al. 2017

View full text Add to dashboard Cite

Abstract:The lack of access to clean water remains a severe issue all over the world. Coupling photocatalysis with the membrane separation process, which is known as a photocatalytic membrane reactor (PMR), is promising for water treatment. PMR has developed rapidly during the last few years, and this paper presents an overview of the progress in the configuration and operational parameters of PMRs. Two main configurations of PMRs (PMRs with immobilized photocatalyst; PMRs with suspended photocatalyst) are comprehensively described and characterized. Various influencing factors on the performance of PMRs, including photocatalyst, light source, water quality, aeration and membrane, are detailed. Moreover, a discussion on the current problems and development prospects of PMRs for practical application are presented.

show abstract

“…The membrane process has the advantage of compactness, good retention and separation effects for suspended and colloidal organic and inorganic substances, pathogenic bacteria, and microorganism, compared with conventional separation processes [1]. However, the fouling caused by the organic and inorganic substances is still a disadvantage for the development of membrane technology.…”

Section: Introductionmentioning

confidence: 99%

Titanium-based photocatalysis as the pretreatment for ultrafiltration of secondary municipal effluent with low concentration of organic matters

Liu¹,

Li²

2007

WIT Transactions on Ecology and the Environment, Vol 103

View full text Add to dashboard Cite

Ultrafiltration (UF) has been regarded as a cost-effective option compared to NF and RO for the municipal effluent reclamation process. But the fouling caused by organic matter from the biologically treated sewage effluent is still a serious problem in the process. The photocatalysis was employed as the pretreatment measure for the ultrafiltration of secondary effluents. The fouling potential k was significantly lowered by this pretreatment measure. The effects of catalyst type (anatase, rutile, and Degussa P-25), catalyst dosage, pH value, and UV light intensity on fouling potential variation and dissolved organic carbon (DOC) removal were investigated. The results showed that the presence of UV and TiO 2 improved DOC removal ratio. The effect of photocatalyst type on fouling potential abatement was compared. The pH value and catalyst concentration were optimized to get the highest fouling potential reduction and DOC removal efficiency.

show abstract

A new combination of a membrane and a photocatalytic reactor for the depollution of turbid water

Cited by 95 publications

References 29 publications

Environmental optimization of tree-shaped water distribution networks

Environmental optimization of tree-shaped water distribution networks

Photocatalytic Membrane Reactors (PMRs) in Water Treatment: Configurations and Influencing Factors

Titanium-based photocatalysis as the pretreatment for ultrafiltration of secondary municipal effluent with low concentration of organic matters

Contact Info

Product

Resources

About